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About One Cloud Computing Simulation Model

About One Cloud Computing Simulation Model

引用

systems of signals generating and processing in the field of on board communications

作者： P. E. Golosov I. M. Gostev Moscow Russia The Institute for Information Transmission Problems (Kharkevich institute) Moscow Russia

Today, the use of cloud resources is becoming increasingly popular. On the one hand, it is mere data storage and their respective sharing by a number of users, on the other hand, it is the opportunities that open up following large computing resources available “in the cloud”. An important aspect is the hash function search technologies and adjusting approaches to managing computing resources due to the specifics of their service algorithms. The article considers a simulation model for a computational process built in the Simulink environment (SimEvent) and based on the queueing theory of a G/G/n/inf. system with a set of input streams, an infinite queue, two feedbacks formed by re-processing a request in case of a device failure, and because of the possibility of an extranonce situation and its handling. The results of modeling are considered for different input flows - deterministic, uniformly distributed, Poisson and exponential, with different service disciplines and different laws of processing requests in the queue. The advantages and disadvantages of the proposed model are analyzed in comparison with the well-known methods of controlling input streams (scheduling tasks in operating systems).

关键词： Cloud computing Software packages Processor scheduling Computational modeling Operating systems Memory Mathematical model

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Methodology for Evaluating the Probability of Communication Disconnection in Radio Channels of the systems with Space-Time Coding of Signal

Methodology for Evaluating the Probability of Communication ...

引用

systems of signals generating and processing in the field of on board communications

作者： A. G. Samoylov I. A. Al Tahar Vladimir State University named after Alexander and Nikolai Stoletovs Vladimir Russia

The paper presents a methodology for assessing the probability of communication disruptions in one beam of a radio communication system operating on the technology of space-time coding of signals. Expressions are given for an accurate and for an approximate estimate of the probability of communication disruptions in radio channels with multipath and signal fading. Long-term experimental studies of signal fading on a long-range tropospheric radio link have been carried out. It has been experimentally proven that the Rayleigh description of interference fading in multipath propagation of signals is observed in 60% of the time of communication sessions. For the rest of the communication sessions, other laws of probability distribution are observed. It is confirmed that they, together with Rayleigh's description of fading, are special cases of the four-parameter law of probability distribution. Convenient for practical use formulas are obtained for estimating the noise immunity of a communication channel. The graphs of the dependence of the probability of communication failure on the ratio of the average received signal power and the threshold level of the receiver signal are given.

关键词： Channel estimation Rayleigh channels Receivers Interference Radio links Probability distribution Encoding

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Research of an Ultra-Wideband Distributed Amplifier Based on field-Effect Transistors

Research of an Ultra-Wideband Distributed Amplifier Based on...

引用

2020 systems of signals generating and processing in the field of on board communications

作者： Shmakov, N.D. Ivanyushkin, R. Yu Moscow Technical University of Communications and Informatics Moscow Russia

ISBN: (纸本)9781728147727

The main tasks are discussed in this paper such as in the construction of transmitters of digital television broadcasting, in particular the task of constructing a universal preamplifier, which can be used regardless of any particular channel. Distributed amplifiers permit to build wide-range power amplifiers with constant gain in the preset frequency range. The main feature of the construction of distributed amplifiers is using input and output capacitances of amplifying device in the artificial transmission lines. The main advantages and disadvantages of this type of amplifiers are presented in the paper. The method of calculation of distributed amplifier for UHF and the research its energetic characteristics are discussed in the paper. The further research tasks for this type of amplifier are given. © 2020 IEEE.

关键词： Power amplifiers

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The New Neural Network Based Framework for Fading Channel Prediction for 5G

The New Neural Network Based Framework for Fading Channel Pr...

引用

2020 systems of signals generating and processing in the field of on board communications

作者： Konstantinov, A.S. Pestryakov, A.V. Moscow Technical University of Communications and Informatics Moscow Russia

ISBN: (纸本)9781728147727

The paper presents a developed framework based on several neural networks with fine tuning for predicting CQI based on the time series of SINR values in order to select the best MCS on the eNB side, taking into account fading in the radio channel in downlink. A comparative analysis of the performance of modern architectures in solving the problem of forecasting time series and substantiating the choice of LSTM as the core of the predictive framework is performed. A comparative analysis of the learning algorithms of the architectures under consideration is performed. The choice of the model is justified and the performance evaluation of the developed framework is given. The choice of parameters of the developed predictive framework is justified. © 2020 IEEE.

关键词： 5G mobile communication systems

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Modeling of Nonlinear Distortions in 5G NR systems

Modeling of Nonlinear Distortions in 5G NR Systems

引用

systems of signals generating and processing in the field of on board communications

作者： S. V. Kulygin V. O. Kazachkov Moscow Aviation Institute (National Research University) Moscow Russia

Due to the peculiarities of the physical level of 5G NR (Fifth Generation New Radio) systems, nonlinear distortion of the amplifying path is one of the main negative affecting on the signal. Existing mathematical models of amplifier nonlinearities in the context of their application in the simulation of fifth-generation signals require adaptation. The work proposes the coefficients for nonlinear distortion of power amplifiers for Saleh and Ghorbani models. Based on the simulation model developed in MA TLAB, the spectral characteristics of the simulated processes of nonlinear distortion, amplitude-amplitude and amplitude-phase distortions, as well as the effect of nonlinearity on the noise immunity of the system (the dependence of the bit error rate (BER) from the signal-to-noise ratio (SNR)) for the 5G NR signal of the second numerology (200 MHz signal bandwidth) for all types of modulation supported by the standard on sub carrier frequencies (QPSK, 16QAM, 64QAM, 256QAM) are studied.

关键词： Adaptation models Phase shift keying Nonlinear distortion Bit error rate Power amplifiers New Radio Mathematical model

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Electronic warfare as a task of maintaining homeostasis in an information conflict

Electronic warfare as a task of maintaining homeostasis in a...

引用

2020 systems of signals generating and processing in the field of on board communications

作者： Zhiburtovich, Nikolay Yuryevich Moscow Aviation Institute National Research University Moscow Russia

ISBN: (数字)9781728147727

ISBN: (纸本)9781728147727

The basic properties of electronic systems involved in electronic warfare are revealed. Based on the analysis of these properties, it is proposed to consider electronic warfare as the task of maintaining homeostasis in an information conflict. The systematic approach developed as part of the task is based on the analysis of the conflict interaction of developing information systems (IS). Each of the IS in relation to the other participant in the conflict plays the role of the external environment. Based on this approach, the basic principles and rules of building developing IS are formulated. The determining factors in assessing the effectiveness of such systems are the adopted concept and strategies for their functioning. In a generalized form, the optimal concept of the functioning of IS is reduced to resolving the conflict of IS with the external environment in their favor while maintaining the ability to develop. This allows you to avoid fundamental (gross) errors in the formation of the concept of design information systems and correctly evaluate their effectiveness with minimal cost. © 2020 IEEE.

关键词： Information systems

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Influence of Auxiliary Braking systems on Deceleration of Vehicles of Category M1

Influence of Auxiliary Braking Systems on Deceleration of Ve...

引用

systems of signals generating and processing in the field of on board communications

作者： I. S. Gladushevskiy A. V. Terentyev S. S. Evtyukov D. B. Efimenko Saint Petersburg State University of Architecture and Civil Engineering St. Petersburg Russia Moscow Automobile and Road Construction State Technical University (MADI) Moscow Russia

The auxiliary braking systems of vehicles of category M1, installed from the factory and affecting deceleration, are considered. Comparison of the results of steady-state deceleration on dry asphalt concrete pavement at an air temperature of +17 ± 0,5°C will be carried out. For further experimental studies, factors and systems will be identified. Studies have shown that auxiliary systems affect the stability of deceleration and its magnitude. Comparison of vehicle deceleration with different blocks of auxiliary systems is made. The influence of developing auxiliary systems allows for a shorter braking distance, improved braking stability and an increased deceleration value. Keywords-brake system, ABS, braking, car component, smart system.

关键词： Temperature Asphalt Production facilities Steady-state Brakes Automobiles Thermal stability

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Monitoring Anomalous States of Computer systems by Intellectual Analysis of Data of System Journals

Monitoring Anomalous States of Computer Systems by Intellect...

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2020 systems of signals generating and processing in the field of on board communications

作者： Sheluhin, O.I. Kostin, D.V. Gorodnichev, M.G. Moscow Technical University of Communications and Informatics Moscow Russia

ISBN: (纸本)9781728147727

The ways and algorithms for automating the control of computer systems by intelligently analyzing unstructured data from system logs in order to detect and diagnose abnormal states are analyzed. This information is needed by the technical support service to localize the problem and accurately diagnose it. Because of the ever-increasing size of logs, intelligent analysis data models are being used to help developers extract system information. The research was conducted on a network infrastructure consisting of 6 hosts that make up a cluster under Rancher management. Expertly, events that significantly affect the system and are abnormal, related to problems with the passage of traffic on the network, or denial of service. Of the 988 message templates, 81 patterns are marked as abnormal. © 2020 IEEE.

关键词： Decision making

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The Application of the Joint Range and Speed Estimation Method in Short-Range Radars Using Ultra-Wideband signals with a Pseudo-Random Frequency Coding

The Application of the Joint Range and Speed Estimation Meth...

引用

2020 systems of signals generating and processing in the field of on board communications

作者： Sapronov, D.I. Kamenskiy, I.V. Moscow Aviation Institute National Research University Moscow Russia

ISBN: (纸本)9781728147727

This article uses the previously presented method [1] of joint estimation of range and radial velocity in short-range radars using one ultra-wideband signal with discrete frequency coded waveform (DFCW). The core of the method is the use of the expression of the two-dimensional digital compression function of the output of the radar receiver ADC. The results of the practical implementation of this method are presented in a radar with a generation circuit using a phase-locked loop (PLL) generator, direct digital synthesis generator (DDS) and a quadrature modulator (IQ modulator). The results of the method are compared for signals with linear and pseudo-random frequency codes. The results of the method after using the calibration algorithm are presented. © 2020 IEEE.

关键词： Radar receivers

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Bit Error Rate Performance of Power Domain Non-Orthogonal Multiple Access systems

Bit Error Rate Performance of Power Domain Non-Orthogonal Mu...

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systems of signals generating and processing in the field of on board communications

作者： V. O. Kazachkov N. A. Soldatenkova Moscow Aviation Institute (National Research University) Moscow Russia

Article focuses at research Bit Error Rate (BER) for Orthogonal Frequency-Division Multiple Access (OFDMA) infocommunication system with Power-Domain Non-Orthogonal Multiple Access (PD-NOMA) for two user equipments. Developed imitation model in MATLAB/Simulink environment with Symbol Level - Successive Interference Cancellation (SL-SIC) is presented. Simulation parameters are equivalent of downlink 5G New Radio (5G NR) standard by 3GPP for second numerology with Quadrature Phase Shift Keying (QPSK) and Quadrature Amplitude Modulation (QAM) with order M = 16, 64, 256 on subcarriers. Presented dependencies BER from Signal-to-Noise Ratio (SNR) for different levels mean power of signals on subcarriers for Additive White Gaussian Noise (AWGN) channel. All presented results received for sample size providing confidence level no lower 90% and relative accuracy no more 10%.

关键词： AWGN channels NOMA Interference cancellation Quadrature amplitude modulation Bit error rate Tools Downlink

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